test: guard hidden Week Ahead journey sheet (Closes #1264)

tests/e2e/test_mobile_today_week_reschedule_release.py

@@ -69,7 +69,10 @@ def test_release_artifact_reschedules_active_today_into_week_ahead(
             expect(page.locator("#issue-sheet-title")).to_have_text("Ship mobile capture")
             if page.locator("#plan-today-sheet").is_visible():
                 page.locator("#cancel-plan-today").click()
-            page.locator("#close-issue-sheet").click()
+            issue_sheet = page.locator("#issue-sheet")
+            if issue_sheet.is_visible():
+                page.locator("#close-issue-sheet").click()
+            expect(issue_sheet).to_be_hidden()
             if page.locator("#plan-today-sheet").is_visible():
                 page.locator("#cancel-plan-today").click()